Latch-opener



(No Model.)

W. M. LEAVENS LATCH OPENER. No. 430,779. Patented June 24, 1890.

PATENT ()FFICE.

WVILLIAM M. LEAVENS, OF SAN FRANCISCO, CALIFORNIA;

LATCH-OPEN ER.

SPECIFICATION forming part of Letters Patent No. 430,779, dated June 24, 1896. Application filed October 23, 1888. Renewed November 27, 1889. Serial No. 331,766. (No model.)

To alt whom it may concern:

Be it known that I, WILLIAM M. LEAVENS, a citizen of the United States, residing in'the city and county of San Francisco and State of California, have invented a new and useful Improvement in Latcl1Openers, of which the following is a specification.

My invention relates to certain novel and ing the latter engaged with the face-plate.

Fig. 2 is a similar view of the same parts, showing the latch or bolt pressed back in a position to allow the door to be opened. Fig. 3 is a side view of the pivotal gravitating segmental dog or unlatching segment. Fig. 4 is a top view of the devicepart of the said dog, being shown in section.

Referring to the annexed drawings, A designates a lock-plate to receive the latch or bolt 0, which is adapted to enter said plate in the mortise B. i

E designates a bracket, which is rigidly secured to the lock plate A, and which has fixed to it a cylindrical stud G. On this stud is a washer or boss P, and also a cam or segment F, which is provided with an arm Q and also with a recoil-spring I-I, one end of which is attached to the stud G and the other to the segment F. This segment is provided on that side next to the bracket E with studs or stop-pins L L, and at the lower terminus of the arc of this segment a fiat locking-face a. is provided, for a purpose which will be hereinafter explained. I also provide an eye I) on the lower edge of this segment, to which an actuating-rod 0 may be attached.

I designates a segmental gravitating dog, which is pivoted to cars rigidly secured to the plateA. This dog is of the form clearly shown in Fig. 3, presenting on that edge next to the nose of the bolt 0 a rounded starting-cam c and a flat surface 0. That edge c ot the segment next to the periphery of the segment F is the concave are of a circle, which is concentric to the axis of .the stud G when the several parts of my device are in the position indicated in Fig. 2 and the bolt unlocked. This gravitating segment Iis also provided at the upper end of the are c with a stud K.

In lieu of the spring H, I may employ a weight.

In operation, when the arm Q of the segment F is fully depressed by any means, as represented in Fig. 1 ot' the annexed drawings, the flat locking-face a abuts squarely against the concave edge a of the segment I, and this segment is held practically free from the bolt 0 by the lower pin L engaging with the stud K. By raising the arm Q or by pulling down on the rod 0 the segment can be brought to the position indicated in Fig. 2, in which position the upper pin L engages with the stud K of segment I, forces this segment against the nose of the bolt 0, and causes the parts to assume the position indicated in Fig. 2.

It is obvious from the foregoing that the segment F may be vibrated about its stud G either by hand, using the arm Q as the handle, or that this segment may be operated by other suitable means.

Having described my invention, I claim- 1. The combination of the mortised face plate A and the bolt C, of a gravitating dog I, provided with a stud K, and a vibrating segment provided with pins adapted to engage with said stud and to actuate the dog, as specified.

2. The combination, with the mortised faceplate and a bolt or latch, of a spring-actuated segment F, provided with pins, as described, and a dog provided with a stud K and arranged between the said segment and belt or latch, substantially asspecified.

\VILLIAM M. LEAVENS.

\Vitnesses:

JOHN H. Rnnsronn, K. B. REDSTONE. 

